style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400&display=swap');

:root{
    --blue:#3c6382;
    --dark-blue:#0a3d62;
}

*{
    font-family: 'Poppins', sans-serif;
    margin:0; padding:0;
    box-sizing: border-box;
    text-decoration: none;
    outline: none;
    border:none;
    text-transform: capitalize;
    transition: all .3s cubic-bezier(.38,1.15,.7,1.12);
}

*::selection{
    background:var(--dark-blue);
    color:#fff;
}

html{
    font-size: 62.5%;
    overflow-x: hidden;
}

section{
    min-height: 100vh;
    padding:1rem 9%;
    padding-top: 8rem;
}

.heading{
    text-align: center;
    color:var(--blue);
    font-size: 3.5rem;
    text-transform: uppercase;
    font-weight: normal;
    padding:1rem;
}

header{
    width:100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top:0; left:0;
    z-index: 1000;
    padding:2rem;
}

header .logo{
    font-size: 2.5rem;
    color:var(--dark-blue);
}

header .logo span{
    color:var(--blue);
}

header .navbar a{
    font-size: 1.7rem;
    margin-left: .7rem;
    padding:.5rem 2rem;
    border-radius: .5rem;
    color:var(--dark-blue);
}

header .navbar a.active,
header .navbar a:hover{
    background: var(--blue);
    color:#fff;
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.1);
}

header.sticky{
    background:#fff;
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.1);
}

#menu{
    font-size: 3rem;
    color:var(--blue);
    cursor: pointer;
    display: none;
}

.home{
    background:url(../images/home-bg.jpg) no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.home .content{
    text-align: center;
    padding-top: 3rem;
}

.home .content h1{
    font-size: 5rem;
    color:var(--dark-blue);
}

.home .content h3{
    font-size: 4rem;
    color:var(--blue);
    font-weight: normal;
}

.home .content .btn{
    display: inline-block;
    padding:.7rem 3rem;
    color:rgb(190, 21, 21);
    background:var(--blue);
    border-radius: .5rem;
    box-shadow: 0 .5rem 1rem rgba(82, 116, 81, 0.1);
    margin-top: 1rem;
    font-size: 1.7rem;
}

.home .content .btn:hover{
    background:var(--dark-blue);
}

.prevent .box-container{
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.prevent .box-container .box{
    flex:1 1 30rem;
    border-radius: .5rem;
    margin:1rem;
    padding:1rem;
    text-align: center;
}

.prevent .box-container .box img{
    height:12rem;
    padding:1rem;
}

.prevent .box-container .box h3{
    color:var(--blue);
    font-size: 2rem;
}

.prevent .box-container .box p{
    color:var(--dark-blue);
    font-size: 1.4rem;
    padding:1rem;
}

.prevent .box-container .box:hover{
    box-shadow: 0 .5rem 1rem rgba(230, 7, 7, 0.1);
}

.symptoms{
    background:url(../images/background-img.jpg) no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.symptoms .column{
    display: flex;
    align-items: center;
    justify-content: center;
}

.symptoms .column .main-image img{
    width: 43vh;
}

.symptoms .column .box-container{
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.symptoms .column .box-container .box{
    margin:1rem;
    text-align: center;
}

.symptoms .column .box-container .box img{
    width:20rem;
    padding:1rem;
}

.symptoms .column .box-container .box h3{
    font-size: 2rem;
    color:var(--blue);
}

.precautions .column{
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.precautions .column .box-container{
    margin:1.5rem;
    flex:1 1 50rem;
    border:.1rem solid rgba(0,0,0,.1);
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.1);
    border-radius: .5rem;
}

.precautions .column .box-container .title{
    padding:1.5rem .5rem;
    text-align: center;
    font-size: 2.5rem;
    background:var(--blue);
    color:#fff;
}

.precautions .column .box-container:last-child .title{
    background:#ff3300;
}

.precautions .column .box-container .box{
    display: flex;
    justify-content: center;
    align-items: center;
    padding:1rem;
}

.precautions .column .box-container .box img{
    width:15rem;
    padding:1rem;
}

.precautions .column .box-container .box h3{
    font-size: 2rem;
    color:var(--blue);
}

.precautions .column .box-container .box p{
    font-size: 1.2rem;
    color:var(--dark-blue);
    padding:1rem 0;
}

.doctor{
    background:url(../images/background-img.jpg) no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.doctor .box-container{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.doctor .box-container .box{
    border-radius: .5rem;
    box-shadow: 0 .5rem 1rem rgba(0,0,0,.1);
    padding:1rem;
    margin:1.5rem;
    text-align: center;
    background:rgb(67, 167, 185);
    border:.1rem solid rgba(0,0,0,.1);
    width:33rem;
}

.doctor .box-container .box img{
    margin:1rem;
    border-radius: 50%;
    height:20rem;
    width:20rem;
    object-fit: cover;
    background:var(--blue);
}

.doctor .box-container .box h3{
    font-size: 2rem;
    color:var(--blue);
}

.doctor .box-container .box span{
    font-size: 1.5rem;
    color:var(--dark-blue);
}

.doctor .box-container .box .share{
    border-top: .1rem solid rgba(0,0,0,.1);
    padding:1rem;
    margin-top: 1rem;
}

.doctor .box-container .box .share a{
    border-radius: 50%;
    height: 4.5rem;
    width:4.5rem;
    line-height: 4.5rem;
    font-size: 2rem;
    margin: .4rem;
    background:rgb(69, 174, 192);
    color:var(--white);
}

.doctor .box-container .box .share a:hover{
    background:var(--blue);
    color:rgb(70, 156, 167);
    transform: rotate(360deg);
}

.hand-wash .column{
    display: flex;
    justify-content: center;
}

.hand-wash .column .main-image img{
    width:25vw;
}

.hand-wash .column .box-container{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.hand-wash .column .box-container .box{
    text-align: center;
    margin:2rem;
}

.hand-wash .column .box-container .box img{
    width: 17rem;
    height: 17rem;
    padding:1rem;
}

.hand-wash .column .box-container .box h3{
    font-size: 2rem;
    color:var(--blue);
}
.btn{
    cursor: pointer;
    color: #cc0052;
    font-size: 18px;
    letter-spacing: 2px;
    padding: 10px 30px;
    border: 2px solid #003333;
    background: transparent;
    text-decoration: none;
    text-align: center;
    font-weight: bold;
    margin: 40px 8px;
}
.btn a:link{
    text-decoration: none;
}

.footer{
    background:url(../images/background-img.jpg) no-repeat;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.footer .box-container{
    display: flex;
    flex-wrap: wrap;
}

.footer .box-container .box{
    flex:1 1 25rem;
    margin:2rem;
}

.footer .box-container .box h3{
    font-size: 2.5rem;
    color:var(--blue);
    padding:1rem 0;
}

.footer .box-container .box p{
    font-size: 1.5rem;
    color:var(--dark-blue);
    padding:.5rem 0;
}

.footer .box-container .box a{
    font-size: 1.5rem;
    color:var(--dark-blue);
    padding:.5rem 0;
    display: block;
}

.footer a:hover{
    text-decoration: underline;
}

.footer .credit{
    font-size: 2rem;
    font-weight: normal;
    text-align: center;
    border-top: .1rem solid rgba(0,0,0,.1);
    padding:2.5rem 1rem;
    color:var(--dark-blue);
}

.footer .credit a{
    color:var(--blue);
}

.scroll-top{
    position: fixed;
    bottom:7.5rem; right:1.5rem;
    z-index: 1000;
}

.scroll-top img{
    width:8rem;
    animation: float 3s linear infinite;
}

@keyframes float{
    100%, 0%{
        transform: translateY(0rem);
    }

    50%{
        transform: translateY(-3rem);
    }

}

/* media queries  */

@media (max-width:1200px){

    html{
        font-size: 55%;
    }

}

@media (max-width:991px){

    section{
        padding:1rem 3%;
        padding-top: 8rem;
    }

    #menu{
        display: block;
    }

    header .navbar{
        position: absolute;
        top:100%; left: 0;
        width:100%;
        background:#fff;
        padding:2rem;
        border-top: .1rem  solid rgba(0,0,0,.1);
        transform-origin: top;
        transform: scaleY(0);
        opacity: 0;
    }

    header .navbar.nav-toggle{
        transform: scaleY(1);
        opacity: 1;
    }

    header .navbar a{
        display: block;
        margin:1.5rem 0;
        font-size: 2rem;
    }

    .fa-times{
        transform: rotate(180deg);
    }

    .symptoms .column .main-image img{
        display: none;
    }

    .hand-wash .column .main-image img{
        display: none;
    }

}

@media (max-width:768px){

    html{
        font-size: 50%;
    }

    .home .content h1{
        font-size: 4rem;
    }

    .home .content h3{
        font-size: 3.5rem;
    }

}

@media (max-width:450px){

    .home .content h1{
        font-size: 3.5rem;
    }

    .home .content h3{
        font-size: 2.5rem;
    }

    .symptoms .column .box-container .box img{
        width:14rem;
    }

    .precautions .column .box-container .box{
        flex-flow: column;
        text-align: center;
    }

    .doctor .box-container .box{
        width:100%;
    }

}